It would be great if table joins,relates and queries/graphs could be maintained when creating pmf data packages for ArcReader.
If the pmf and data packaging was designed to allow for easy (and safe) distribution of map data without the complications of web-hosting (site building, deployment, licensing etc), then it should be able to support the packaging of most of the end-user related information, data and views used in an mxd - i.e. expand on the client/end-user services/features rather than the gis user/developer functionality.
It would allow for a GIS technician/developer/specialist to design, develop and build toward offering client-relevant information rather than data-driven/functional capability.